The four counties for Arizona Territory (Castle Dome, Ewell, Mesilla, and Dona Ana) were actually proposed at the Constitutional Convention held in Tucson from 2 to 5 April 1860. A map was created showing those four counties.[2]

The version of this article before 4 January 2013 was also misleading.

When the Union took over control of Arizona, they wanted nothing similar to the Confederate Territory. Therefore the shape and size of the territory was changed drastically and the counties if they still existed were dissolved. No new counties were patterned after those old Confederate counties. See Previous Jurisdictions to land in Arizona.